結果

問題 No.274 The Wall
ユーザー prin_kemkemprin_kemkem
提出日時 2023-05-11 21:44:05
言語 PyPy3
(7.3.15)
結果
MLE  
実行時間 -
コード長 3,305 bytes
コンパイル時間 285 ms
コンパイル使用メモリ 87,192 KB
実行使用メモリ 809,392 KB
最終ジャッジ日時 2023-08-18 12:43:17
合計ジャッジ時間 7,841 ms
ジャッジサーバーID
(参考情報)
judge15 / judge14
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 138 ms
78,332 KB
testcase_01 AC 133 ms
78,568 KB
testcase_02 AC 142 ms
78,328 KB
testcase_03 AC 956 ms
393,820 KB
testcase_04 AC 166 ms
78,576 KB
testcase_05 AC 138 ms
78,532 KB
testcase_06 AC 134 ms
78,732 KB
testcase_07 AC 136 ms
78,616 KB
testcase_08 AC 136 ms
78,532 KB
testcase_09 AC 136 ms
78,640 KB
testcase_10 AC 129 ms
78,620 KB
testcase_11 MLE -
testcase_12 AC 898 ms
82,332 KB
testcase_13 AC 201 ms
81,024 KB
testcase_14 AC 215 ms
82,372 KB
testcase_15 AC 210 ms
82,360 KB
testcase_16 AC 1,186 ms
415,272 KB
testcase_17 AC 1,157 ms
370,328 KB
testcase_18 AC 1,204 ms
415,220 KB
testcase_19 AC 237 ms
83,936 KB
testcase_20 AC 245 ms
83,844 KB
testcase_21 AC 246 ms
83,136 KB
testcase_22 AC 258 ms
83,316 KB
testcase_23 AC 252 ms
83,456 KB
testcase_24 AC 259 ms
83,280 KB
testcase_25 AC 256 ms
84,092 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

from collections import defaultdict, deque, Counter
import copy
from itertools import combinations, permutations, product, accumulate, groupby
from heapq import heapify, heappop, heappush
import math
import bisect
from pprint import pprint
import sys
# sys.setrecursionlimit(700000)
input = lambda: sys.stdin.readline().rstrip('\n')
inf = float('inf')
mod1 = 10**9+7
mod2 = 998244353
def ceil_div(x, y): return -(-x//y)

#################################################

def sccd(adj, radj):
    n = len(adj)
    been = [False]*n
    P = []
    for s in range(n):
        if been[s]: continue
        stack = [s]
        while stack:
            now = stack.pop()
            if now >= 0:
                if been[now]: continue
                been[now] = True
                stack.append(~now)
                for nxt in adj[now]:
                    if been[nxt]: continue
                    stack.append(nxt)
            else:
                P.append(~now)
    scc_idx = [None]*n
    idx = 0
    for s in reversed(P):
        if not been[s]: continue
        been[s] = False
        stack = [s]
        while stack:
            now = stack.pop()
            scc_idx[now] = idx
            for nxt in radj[now]:
                if not been[nxt]: continue
                been[nxt] = False
                stack.append(nxt)
        idx += 1
    return scc_idx

class Two_SAT:
    def __init__(self, n) -> None:
        self.n = n
        self.adj = [[] for _ in range(2*n)]
        self.radj = [[] for _ in range(2*n)]
    def add(self, x, y): # 否定したいときは~xを入れる
        if x >= 0 and y >= 0:
            self.adj[self.n+x].append(y)
            self.radj[y].append(self.n+x)
            self.adj[self.n+y].append(x)
            self.radj[x].append(self.n+y)
        elif x >= 0:
            y = ~y
            self.adj[self.n+x].append(self.n+y)
            self.radj[self.n+y].append(self.n+x)
            self.adj[y].append(x)
            self.radj[x].append(y)
        elif y >= 0:
            x = ~x
            self.adj[x].append(y)
            self.radj[y].append(x)
            self.adj[self.n+y].append(self.n+x)
            self.radj[self.n+x].append(self.n+y)
        else:
            x = ~x; y = ~y
            self.adj[x].append(self.n+y)
            self.radj[self.n+y].append(x)
            self.adj[y].append(self.n+x)
            self.radj[self.n+x].append(y)
    def solve(self):
        scc_idx = sccd(self.adj, self.radj)
        ret = [False]*self.n
        for x in range(self.n):
            i, j = scc_idx[x], scc_idx[self.n+x]
            if i == j:
                return None
            ret[x] = i > j
        return ret

def is_intersect(li, ri, lj, rj):
    if li > lj: li, ri, lj, rj = ri, rj, li, lj
    return lj <= ri

N, M = map(int, input().split())
blocks = [tuple(map(int, input().split())) for _ in range(N)]
sat = Two_SAT(N)
for i in range(N):
    li, ri = blocks[i]
    for j in range(i+1, N):
        lj, rj = blocks[j]
        if is_intersect(li, ri, lj, rj): sat.add(~i, ~j)
        if is_intersect(li, ri, M-1-rj, M-1-lj): sat.add(~i, j)
        if is_intersect(M-1-ri, M-1-li, lj, rj): sat.add(i, ~j)
        if is_intersect(M-1-ri, M-1-li, M-1-rj, M-1-lj): sat.add(i, j)
del blocks
ans = sat.solve()
print("YNEOS"[ans is None::2])
0